Anybody use .065 line?

I was wondering if anyone uses .065 diameter trimmer line. I am using .095 Echo Cross Fire currently and would like to use something that gives me more RPM's to work with. I know I could use .080 but I'm looking at something even smaller than that. I was also wondering for those of you that run .065 if it breaks too easily or wears too fast. Thanks

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Some mowers, some trimmers, and even some blowers,
plus a bunch of other noisy stuff.

The thing is I was watching another lawn service today and the trim guy was blowing through and still doing a great job. It seemed like his trimmer cut the grass like butter without even dropping a single RPM. Maybe he had a big trimmer (didnt look like it) or I thought he was running a smaller line creating less resistance for the trimmer. Who knows, maybe I'm just an incompetent trimmer operator.

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Some mowers, some trimmers, and even some blowers,
plus a bunch of other noisy stuff.